Changes in version 0.3a:
------------------------

* - New logo, made of mosaic graphics characters :-)

* - Several routines converted to machine code, and a more
efficient method of generating and calling the m/c routines
used. This has quite substantially speeded-up most of the 
previously very slow tasks. There is more work to do in this
area, but it is getting better! 

* - Songs that overwrite the system or BASIC areas are now
supported. This makes several more files playable, including
Matthew Westcott's superb Acoustic Dreams, and a lot of 48K
beeper tunes. 

* - Added an option to load a new AY file directly from
playback mode: Just push 'F' during playback (interrupt-driven
songs only, obviously). This makes the full complement of
playback controls as follows: 
        'N' jumps to the next tune, 
        'P' for the previous tune, 
        'R' rewinds the current tune to the beginning,
        'L' returns to the list. 
        'F' loads a new AY file from tape. 
Also, numbers 1 to 9 jump directly to tunes 1-9 respectively, 
while '0' jumps to tune 10. Any other key has the same function
as 'N'. Note that the controls are only available for interrupt-
driven tunes. 

* - A few cosmetic changes.